In his first-ever interview, the sole Australian survivor of the Waco siege has revealed to 60 Minutes what really took place during the 51-day stand-off, and why he believes crazed cult leader David Koresh will one day return to Earth as the son of God.

Louise Bell family seek court privacy

The family of abducted and murdered Adelaide schoolgirl Louise Bell have asked a judge to allow their victim impact statements to be kept private from the media and public.

Prosecutor Ryan Williams says the family could suffer undue hardship if the public knew all the details of how the harrowing ordeal, which began when 10-year-old Louise disappeared in 1983, has affected them.

The statements will be part of sentencing submissions for former maths teacher Dieter Pfennig, 68, who has been found guilty of the girl's murder.

"Mr Bell (Louise's father) in particular feels the statements should only be provided to those who need to know," Mr Williams told the Supreme Court on Friday.

"The impacts of the loss of this child are of course far reaching.

"With the media interest over the years, there has been a lot of attention on the Bell family."

But Mr Williams said the family would be willing to allow edited versions of the statements to be released.